Upgrade `avatarMiddleware` to `polymiddleware` #3193

Job	Run time
Build samples	32s
Print commit stats	1m 5s
Build	5m 3s
Verify build-browser (macos-26)	46s
Verify build-browser (ubuntu-latest)	54s
Verify build-browser (windows-latest)	2m 1s
Unit test	3m 18s
Type definitions test	2m 5s
Static code analysis	3m 35s
HTML test (1/17)	7m 37s
HTML test (3/17)	7m 23s
HTML test (8/17)	7m 19s
HTML test (6/17)	8m 6s
HTML test (4/17)	7m 35s
HTML test (2/17)	7m 46s
HTML test (7/17)	7m 16s
HTML test (5/17)	7m 37s
HTML test (10/17)	7m 35s
HTML test (16/17)	7m 40s
HTML test (12/17)	7m 31s
HTML test (17/17)	7m 25s
HTML test (14/17)	8m 2s
HTML test (15/17)	8m 5s
HTML test (9/17)	7m 51s
HTML test (11/17)	7m 38s
HTML test (13/17)	7m 33s
Merge test snapshots	5s
Merge test results	25s
	2h 29m 48s

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